The first season saw the boys find Eleven, who had psychokinetic powers

Following the phenomenal success of the first series of the science-fiction horror, Millie’s future on the show led to emergency meetings with bosses after becoming a fan favourite.

Executive producers Matt and Ross Duffer previously said Eleven’s return remained “up in the air.”

There is a teaser for the second series, but it sadly doesn’t reveal a great deal.

New characters will be introduced into the latest season, as producer Shawn Levy told SlashFilm: “The plan is to continue with this set of characters while introducing a few critical key new ones next season.

“So I’ll just say that a lot of the big mysteries get answered at the end of season one, but we are very much kind of unearthing new problems and questions that merit future stories and future investigation in the most enjoyable way.